# How do you add 15 percent to a number on a calculator?

Calculate: tips, sales price, percent off, discounted price, price with sales tax, etc.Start Value%ofStartValueEnd Value%=(Enter values into the blue boxes. Answer will appear in t

Calculate: tips, sales price, percent off, discounted price, price with sales tax, etc.

Start Value%ofStartValueEnd Value%=

(Enter values into the blue boxes. Answer will appear in the black box.)
Answers are rounded to 7 decimal places.

## Examples

Example 1:
Your restaurant bill is \$56.47 and you want to leave a 15% tip.
How much is the tip?
How much is the total amount of the bill with the tip?
Start Value% of Start ValueEnd Value56.47+15%64.94
The amount of the tip is: 15% of \$56.47 = \$8.47 (which will be displayed under the % of Start Value box in the calculator)
The total restaurant bill plus the tip is: \$56.47 + \$8.47 = \$64.94
Click to show this example in the calculator above.

Example 2:
You have a 25 percent off coupon. The item you want to buy is \$129.99
How much money will the coupon save you?
What is the cost of the item after using the coupon?
Start Value% of Start ValueEnd Value129.99-25%97.49

The amount you will save is: 25% of \$129.99 = \$32.50 (which will be displayed under the % of Start Value box in the calculator)
The cost of the item after using the coupon is: \$129.99 - \$32.50 = \$97.49
Click to show this example in the calculator above.

Example 3:
The sales tax rate is 8%
An item costs \$49.99
What is the amount of sales tax?
What is the total cost of the item with sales tax.
Start Value% of Start ValueEnd Value49.99+8%53.99

The amount of sales tax is: 8% of \$49.99 = \$4.00 (which will be displayed under the % of Start Value box in the calculator)
The total cost with tax is: \$49.99 + \$4.00 = \$53.99
Click to show this example in the calculator above.